Rotary Trimmers United Rotary Paper Trimmers use a self-sharpening revolving blade that slides along a track making cuts in both directions. United Rotary Trimmers range from tabletop to larger, professional models. The larger trimmers include a solid steel stand, with a fabric catch tray for easy cleanup of paper trimmings. United rotary trimmers feature printed guides on the base for proper alignment and a paper clamp to hold the paper in place while cutting. United’s Rotary Trimmer line is ideal for offices, print shops and design studios.